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Fast Idleing / Hunting

Discussion in 'Norton Motorcycles (Modern)' started by Kiwi961, Oct 13, 2017.

  1. Clive

    Clive VIP MEMBER

    Joined:
    Jun 9, 2017
    Just got mine through - I am going to use the bike to work some more now the weather has improved and get an idea of the regularity of the fast idling issues. I'll then try the plugs and compare....
     
    Fultonrn likes this.
  2. MxMartin

    MxMartin

    Joined:
    Nov 13, 2017
    From new my bike idled at 1200rpm without fail and if I shut throttle at speed in prep for a roundabout etc I got instant throttle reduction and lots of engine breaking. Just had remap done with decat shorts and bike now idles at 1500rpm and if I close the throttle at speed I get very little engine breaking, it's as though the revs only drop once I start breaking.
     
  3. Fast Eddie

    Fast Eddie VIP MEMBER

    Joined:
    Oct 4, 2013
    I rode mine through quite a bit of traffic today and, for the first time, noticed the jerkiness that gets talked about.

    As I understand it, the 02 elimination helps with this, is that right?

    Guess I’ll get the plugs ordered, thanks for clarifying that Tony.
     
  4. Clive

    Clive VIP MEMBER

    Joined:
    Jun 9, 2017
    Very interesting. As an engineer I really want to understand this:- its like something is holding the throttle open/ continuing to provide fuelling. Idle control valve holding open?? Perhaps thats why I get that lovely overrun popping?? Is it preventing the revs dropping to the point where the idle control routine takes over. I'll see how it goes and report.

    As I said before this is more a personality trait than a real issue and I LOVE RIDING THIS BIKE!!!!! Commuted to work today in the sunshine instead of the usual train trudge and got to work in such a good mood I never fired a single person!!!!
     
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  5. Fast Eddie

    Fast Eddie VIP MEMBER

    Joined:
    Oct 4, 2013
  6. richard-7

    richard-7

    Joined:
    Feb 24, 2014
  7. BLIGHTYBRIT/SF

    BLIGHTYBRIT/SF VIP MEMBER

    Joined:
    Feb 28, 2016
    Mine on way , 2 left atm
     
  8. TonyA

    TonyA VIP MEMBER

    Joined:
    Jan 16, 2015
  9. richard-7

    richard-7

    Joined:
    Feb 24, 2014

    Boom. Out of stock!!!
     
  10. Clive

    Clive VIP MEMBER

    Joined:
    Jun 9, 2017
    Anybody got access to a Dyno to compare? Power + emissions.
     
  11. Fast Eddie

    Fast Eddie VIP MEMBER

    Joined:
    Oct 4, 2013
    I don’t think that’s what these are all about Clive. I believe they’re more about removing the low end snatchiness and smoothing out the power delivery.

    I think so anyway...
     
  12. Dkluyskens

    Dkluyskens

    Joined:
    Dec 1, 2017
    just ordered 2, there are 2 left, but the seller told me that he'll have more tomorrow !
     
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  13. Britfan60

    Britfan60 VIP MEMBER

    Joined:
    Jan 5, 2014
    Tony. Thanks for sharing. Excellent info.
     
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  14. Clive

    Clive VIP MEMBER

    Joined:
    Jun 9, 2017
    It's the engineer in me needs to know - plus my herd is not exactly large so I can't afford to lose any neddies......
     
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  15. TonyA

    TonyA VIP MEMBER

    Joined:
    Jan 16, 2015
    Using the resistors will eliminate the inconsistencies coming from the O2 sensors to the ECU. The O2 sensor input to ECU will be the same under all conditions. This would be ideal with a power commander installed. But exactly how it will help without power Commander is yet to be seen. I can imagine that cold starts will be improved and a more consistent idle I hope . The other benefits can be better fuel economy but I don't know. I will report back if I try this . Of interest to me is cold starts , consistent idle , no stalling at stops , low speed plug check , high speed plug check and finally fuel economy at a steady 70 mph which I will compare to my benchmark.
     
    contours likes this.
  16. contours

    contours VIP MEMBER

    Joined:
    Jan 1, 2012
    Definitely of interest to me. I’d really like to trust this bike when I’m 100 miles from home. :rolleyes:
     
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  17. BPHORSEGUY

    BPHORSEGUY

    Joined:
    Nov 29, 2013
    Guys I personally know of at least 10 owners who adjusted that screw because their bikes would not idle. It is a set screw, get over it! There is a about a 1/4 turn of range, too far and the bike idles high when hot, too little and it stalls at stop lites etc. All the bikes have run great now for 4 seasons with no issues, no recalibration...ok. My dealer doesn't even know what the recalibration is!!! Do it or don't it, it's not rocket science, its a set screw!!! Rant over!!!
     
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  18. TonyA

    TonyA VIP MEMBER

    Joined:
    Jan 16, 2015
    Hello guys , I may have given some bad information about the 4 wire Bosch type O2 sensor wiring signal names . I think I told you that the Black wire was the return (earth) . Here is a diagram that shows the wiring of the O2 sensor. Either way , the resistor information and which wires they are bridging is correct .
    [​IMG]
    [​IMG]
     
    Last edited: Apr 8, 2018
    contours likes this.
  19. richard-7

    richard-7

    Joined:
    Feb 24, 2014
    So our ebay purchase will work. Great news. C’mon weather!!!!
     
    contours likes this.
  20. contours

    contours VIP MEMBER

    Joined:
    Jan 1, 2012
    I grabbed a pair, too. It can't hurt.
     

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